Résultats de la recherche
-
Proposal to extend trial of daytime setting of longlines between 15 and 30 April in the Patagonian toothfish longline fishery in CCAMLR Statistical Division 58.5.2
encompass the 2013/14 and 2014/15 fishing seasons. Extending the trial for a further two years will enable ... sufficient daytime fishing effort to occur in the trial period to ensure there is a proper basis for ... assessing whether to allow daytime fishing between 15 and 30 April on a permanent basis. Author(s): J ...
Meeting Document : WG-FSA-13/20 : Auteur(s): J. Barrington and B. Baker (Australia)
-
Species profiles: Target species and common by-catch species
Abstract: A project is proposed to provide CCAMLR with a detailed description of all species ... context of international organisations. This paper provides a brief outline of the work proposed, work ...
Meeting Document : WG-FSA-16/51 : Auteur(s): K.-H. Kock, C.D. Jones and D. Welsford
-
Stable isotope analysis of Southern Ocean fish tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni)
to determine C and N stable isotope composition. Values of?15N and?13C suggested that a minimum of ... occupying the highest level. Some Antarctic toothfish sampled in this study occupied a similar trophic level ... data exist (TOA, ANT, CHW, WGR), a stepwise generalised linear model was used to identify significant ... , sex, and depth. Location and a positive relationship with fish length were usually the only variables ...
Meeting Document : WG-EMM-07/19 : Auteur(s): M.H. Pinkerton, S. Bury, S.M. Hanchet and D. Thompson (New Zealand)
-
Investigation of the sensitivity of the Ross Sea toothfish assessment to withholding subsets of the available data
model outputs of withholding from a stock assessment between one and eight years of age frequency and/or ... tag recapture data. Examining the impact of considering a subset of the available data simulates both ... Subarea 88.2E was used as a sensitivity to examine the impact of withholding data from an assessment based ... on a smaller and shorter data set. In both instances the ‘base case’ model was used, i.e., the models ...
Meeting Document : WG-SAM-11/17 : Auteur(s): S. Mormede (New Zealand)
-
Mitigating killer whale depredation on demersal longline fisheries by changing fishing practices
identify fishing practices that could reduce odontocete depredation, with a focus on killer whales (Orcinus ... : the limited number of depredating killer whales (n = 78 in 2012) may induce a dilution effect with ... negatively influenced by, iii) length of longlines: longer sets may provide killer whales access to a greater ... situations elsewhere. To a greater extent, this study is illustrative of how collaborative work with ...
Meeting Document : WG-FSA-14/P03 : Auteur(s): P. Tixier, J. Vacquie Garcia, N. Gasco, G. Duhamel and C. Guinet
-
Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longline
Abstract: Depredation is a human-wildlife conflict over resource which often includes a ... indirect methods of assessment of depredated biomass over a 11-year period (from 2003 to 2013), both ... the two species co-occurred around vessels. The second method was new in a way that we used the ... only be implemented when a sufficient level of bycatch species occurs, provides strong support to the ...
Meeting Document : WG-FSA-14/10 : Auteur(s): N. Gasco, P. Tixier, G. Duhamel and C. Guinet (France)
-
Monitoring and managing the effects of environmental change on toothfish assessments
Abstract: This paper presents a ‘first-step’ proposal for CCAMLR to consider the effects of ... environmental conditions that are maintained over a number of years, which includes the effects of global ... can be used to identify changes that have occurred, or changes that may currently be occurring, as a ... CCAMLR’s fishery reports may be revised to include a new section on changes in model parameters and ...
Meeting Document : WG-SAM-18/22 : Auteur(s): M. Pinkerton, A. Dunn, S. Mormede and S. Parker
-
Marine classification: lessons from the New Zealand experience
Abstract: New Zealand has a considerable body of experience creating spatial classifications of ... management mandate. This paper considers a range of methodological options for data-driven marine ... ) Generate a classification based on abundance, not presence-absence; 4) Use the most powerful statistical ... methods available, such as BRT and GDM; 5) Use a hierarchical algorithm; 6) Focus on an environment or ...
Meeting Document : WS-BSO-07/6 : Auteur(s): B. Sharp, M. Pinkerton and J. Leathwick (New Zealand)
-
Entanglement of Antarctic fur seals (Arctocephalus gazella) by man made debris at Bird Island, South Georgia, during the 2005 winter and 2005/06 breeding season
reported here. Two entanglements were observed in the winter, a decrease of 60% from the previous year, and ... the lowest number seen since records began in 1990. One of these involved a male pup entangled in ... occurred to an adult female entangled in a plastic packing band causing slight constriction to the ... entanglements were caused by plastic packing bands, this is a 67% increase from the previous year’s observations ...
Meeting Document : SC-CAMLR-XXV/BG/13 : Auteur(s): Delegation of the United Kingdom
-
Satellite tracking of black-browed and light-mantled sooty albatrosses from Heard Island and potential interactions with fisheries
Abstract: The purpose of this document is to inform CCAMLR of the results of a satellite tracking ... fisheries. These fisheries have a history of a low incidental seabird by-catch (no fatalities recorded to ... a further 5% went beyond either EEZ into the high seas north and east of Heard Island. In contrast ...
Meeting Document : WG-FSA-05/14 : Auteur(s): K. Lawton, R. Kirkwood and G. Robertson (Australia)